What i was led to belive that Ferarri, BMW and Mercedies will be frozen, no development. Toyota will be alowed small increments of development, roughly 10-12 BHp increase, however Renault and Honda are going to be allowed to make arround 20-30 BHp increase.
The rumored power ratings of engines are as follows from what ive been led to belive;
Ferarri: 795 BHp
Mercedies: 785 BHp
BMW: 790 BHp
Toyota: 770 BHp
Renault: 755 BHp
Honda: 745 BHp
From what im also led to belive, and was confirmed at Fuji, that the Ferarri has alot of extra (redundant) horspower at the top end, thus making the Ferarri very fast at the end of long straights, as Kimi showed when challenging Robert in the closing stages for 2nd place.
You can see this just by looking at the speed traps, theres Ferarris, STRs and even the odd FIF1 in there, but surprisingly enough this season has seen RBR and Renault get into the top 5 fastest cars in Quali speed traps. Thus showing theese teams have sugh a good aero/chassis package.
Dont quote me on those figures tho, im just going on what someone at my work told me, and im shure those figures arnt right, but could easily be wrong.